In the study, the authors state the following: “Becauseventilator-free days and days free of multiple organ dysfunctionsyndromes are known to have a bimodal distribution, the data wereinitially analyzed by means of Student’s t-test, with between-groupdifferences presented as means and 95% confidence intervals. Asecondary analysis of these outcome measures involving abootstrapped t-test was also conducted to support the results ofthe primary analysis…â€
Try to Justify the logic of these two sentences.
i. why did they initially use a method based on Student’s t-testand why did they do a secondary analysis with a “bootstrappedt-testâ€. Try to explain briefly what the latter means.
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